Adds utility to stringize station values

src/ifcopenshell-python/test/util/test_stationing.py

@@ -0,0 +1,45 @@
+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of IfcOpenShell.
+#
+# IfcOpenShell is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# IfcOpenShell is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
+
+import ifcopenshell.util.stationing as sta
+
+def test_station_as_string():
+    # test with a bunch of "random" station values
+    s = sta.station_as_string(0.0)
+    assert(s == "0+000.000")
+
+    s = sta.station_as_string(0.0,2,2)
+    assert(s == "0+00.00")
+
+    s = sta.station_as_string(0.0,2)
+    assert(s == "0+00.000")
+
+    s = sta.station_as_string(100.00)    
+    assert(s == "0+100.000")
+
+    s = sta.station_as_string(-100.00)    
+    assert(s == "-0+100.000")
+
+    s = sta.station_as_string(123456.789,2,2)    
+    assert(s == "1234+56.79")
+
+    s = sta.station_as_string(-123456.789,2,2)    
+    assert(s == "-1234+56.79")
+
+    s = sta.station_as_string(123456.789,3,4)    
+    assert(s == "123+456.7890")